To access these fields  in AMS360, go toPolicy > Umbrella (C) - Line of Business > Additional Exposures.

Page 3 of the ACORD 131 is divided into sections based on question categories. The Additional Exposures section in AMS360 corresponds with the ACORD 131.

 For example, "Advertisers Liability" data flows from the Advertisers Liability fields; "Aircraft Liability" data flows from the Aircraft Liability fields; etc.